666506732 has 6 divisors (see below), whose sum is σ = 1166386788. Its totient is φ = 333253364.

The previous prime is 666506723. The next prime is 666506741. The reversal of 666506732 is 237605666.

It is an interprime number because it is at equal distance from previous prime (666506723) and next prime (666506741).

It is a self number, because there is not a number n which added to its sum of digits gives 666506732.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83313338 + ... + 83313345.

It is an arithmetic number, because the mean of its divisors is an integer number (194397798).

Almost surely, 2^666506732 is an apocalyptic number.

It is an amenable number.

666506732 is a deficient number, since it is larger than the sum of its proper divisors (499880056).

666506732 is a wasteful number, since it uses less digits than its factorization.

666506732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166626687 (or 166626685 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 41.

The square root of 666506732 is about 25816.7916674400. The cubic root of 666506732 is about 873.5106012490.

The spelling of 666506732 in words is "six hundred sixty-six million, five hundred six thousand, seven hundred thirty-two".